How to switch input radio button checked every 3 seconds?

I am trying to switch between input radio button checked every 3 second in Next.js, and it is switching from case0 to case1 and case1 to case2 but not case2 to case0. I have intermediate level of knowledge in React and Next.js.

import React, { useState, useRef } from 'react';

function Abb() {
  let count = 0;

  const [q1, setq1] = useState(false);
  const [q2, setq2] = useState(false);
  const [q3, setq3] = useState(false);
  const start = Date.now();
  count.toString();
  setInterval(function () {
    let eat = count % 3;
    switch (eat) {
      case 0:
        setq1(true);
        break;
      case 1:
        setq2(true);
        break;
      case 2:
        setq3(true);
        break;
      default:
        break;
    }
    console.log(count + q1 + q2 + q3);
    console.log(q1);
    console.log(q2);
    console.log(q3);
    count++;
    if (count === 3) {
      count = 0;
    }
   
  }, 3000);

  return (
    <>
      <input type="radio" name="addd" id="" checked={q1} readOnly />
      <input type="radio" name="addd" id="" checked={q2} readOnly />
      <input type="radio" name="addd" id="" checked={q3} readOnly />
    </>
  );
}

export default Abb;

Answer

As @Phil mentioned in his answer, you should wrap the setInterval logic inside a useEffect to avoid creating a new setInterval every time the component re-renders. I would also suggest you move the count variable to state and use that directly to update the inputs checked attributes, which avoids creating 3 separate states for it.

import React, { useState, useEffect } from 'react';

function Abb() {
    const [count, setCount] = useState(0);

    useEffect(() => {
        const intervalId = setInterval(() => {
            setCount((c) => ++c % 3);
        }, 3000);
        
        return () => clearInterval(intervalId);
    }, []);

    return (
        <>
            <input type="radio" name="addd" id="" checked={count === 0} readOnly />
            <input type="radio" name="addd" id="" checked={count === 1} readOnly />
            <input type="radio" name="addd" id="" checked={count === 2} readOnly />
        </>
    );
}

export default Abb;